y is cut off in terminal

[octref]

Issue Type: Bug

VS Code version: Code - Insiders 1.28.0-insider (af36149, 2018-09-20T14:01:25.124Z)
OS version: Darwin x64 17.7.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz (8 x 2200)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: enabled rasterization: enabled video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Load (avg)	2, 2, 2
Memory (System)	16.00GB (0.30GB free)
Process Argv	/Applications/Visual Studio Code - Insiders.app/Contents/MacOS/Electron
Screen Reader	no
VM	0%

Extensions (16)

Extension	Author (truncated)	Version
markdown-emoji	bie	0.0.7
markdown-preview-github-styles	bie	0.1.3
vscode-eslint	dba	1.6.0
tslint	eg2	1.0.39
vsc-material-theme	Equ	2.4.2
beautify	Hoo	1.4.3
theme-monokai-pro-vscode	mon	1.1.8
vscode-language-pack-ja	MS-	1.28.0
python	ms-	2018.8.0
debugger-for-chrome	msj	4.10.1
vetur	oct	0.12.6
webview-lsp-inspector	oct	0.0.1
polacode	pnp	0.2.2
vscode-csstree	sme	0.7.0
language-stylus	sys	1.10.0
vim	vsc	0.16.4

(1 theme extensions excluded)

[Tyriar]

#35901

[octref]

But I'm not seeing this in stable. The other issue seems to have been there forever and only affect Linux.

[Tyriar]

@octref you might be seeing #55981 then?

[octref]

@Tyriar Yep. I'm on my home laptop w/o external monitor now and it doesn't happen. So maybe the cause was connecting to an external monitor.